YH Portable prefab house Prefabricated House(labour dormitory), YH prefab house is made of light steel structure, EPS sandwich panel for wall and PU sandwich panel for roof, combination together by the unit of K(K=1820mmthe prefab house is reasonable in assembling and disassembling. Here are two ranks for clients: Standard and luxury which could be available in single storey, two storey and three storey.